Fiber reactive copper complex monoazo-dyestuffs



United States Patent 11 Claims. (Cl. 260-146) This invention provides complex metal compounds of monoazo-dyestuffs which in the form of the free acids correspond to the general formula in which n is the whole number 1, 2 or 3, X represents an acylamino group, Y represents a hydrogen atom or a sulfonic acid group, Z represents a hydrogen or halogen atom or a nitro or acylamino group, and at least one of the symbols X and Z represents a reactive aliphatic acylamino or triazinylamino radical and at least one of the symbols Y represents a sulfonic acid group.

By a reactive aliphatic acylamino radical is meant a grouping capable of combining chemically with the hydroxyl groups of cellulose with the splitting up of a multiple bond or the splitting off of a loosely bound substituent, especially a halogen atom, and more especially the radical, bound through a nitrogen bridge, of an aliphaticB-halogenated and/or mes-unsaturated carboxylic acid containing at most three or, when a halogen atom is present, at most four carbon atoms.

By a reactive triazinylamino radical-is meant a 1:35-

triazine nucleus which is bound through a nitrogen bridge and contains at least one directly bound substituent capable of being split off, especially a halogen atom.

The invention provides more especially 1:2-chromium or cobalt compounds and 1:1-copper compounds of the.

aforesaid monoazo-dyestuffs; and especially copper compounds of monoazo-dyestutis of the formula 3,169,952 Patented Feb. 16, 1965 idatively coppered a monohydroxy-azo dyestufi of the formula least one of the symbols X and Z represents an acylatable amino group, more especially a primary amino group, is acylated at the acylatable amino group by a method in itself known with an anhydride or halide of an aliphatic acid, of which the acyl radical is capable of reacting in the manner referred to above with fibrous materials with the formation of a chemical bond, or with a halogen-triazine in such manner thata reactive acyl radical is formed.

As such anhydrides or halides of aliphatic acids, of which the acyl radical is reactive, there may be mentioned, for examples, anhydrides and halides of aliphatic mfl-unsaturated carboxylic acids, for example, chloromaleic anhydride, propiolic acid chloride, acrylic acid chloride, chloroacrylic acid chloride, and especially halides of aliphatic carboxylic acids containing a mobile halogen atom, such as chloroacetyl chloride, sulfo-chloracetic acid chloride, B-bromoor ,B-chloro-propionic acid chloride or a: fi-dichloro-propionic acid chloride. As halogen-triazines there may be mentioned, cyanuric chloride, cyanuric bromide, and primary condensation products of cyanuric chloride, which contain two chlorine atoms, and, in place of the third chlorine atom, a primary amino grouper an organic radical. Such primary condensation products are, for example, 2-phenyl-4:6-dichloro-1:315- triazine or 2-methyl-4z6-dichloro-l:3:5-triazine, and condensation products of one molecular proportion of cyanuric chloride or cyanuric bromide with molecular proportion of ammonia or a reactive organic mercaptoor hydroxyl-compound, for example, one molecular proportion of a thiophenol, a mercapto-benzthiaz ole, or a thioalcohol, such as mercapto-acetic acid or a thio-acid, such as diethyldithiocarbamic acid, or one molecular proportion of a phenol, a phenol sulfonic acid or an alcohol, such as methyl, ethyl or propyl alcohol; or such condensation products with one molecular proportion of an at most secondary amine, for example, methyl-amine, ethylamine, fi-hydroxyethylamine, isopropylamine, 'y-hydroxypropylamine, methoxy-ethylamine, methoxy-propylamine, cyclohexylamine, morpholine, dimethylamine, diethylamine, N- methyhphenylarnim, para-toluidine, chlorethylamine, an ethanolamine, a carbamic acid ester, aminoacetic acid ethyl ester, aniline, amino-ethane sulfonic acid, N-methyl amino-ethane sulfonic acid, 0rtho-, metaor para-aminobenzoic acid, aminobenzene sulfonic :acids, such as'orthometa-, or para-amino-benZene-sulfonic acid or l-aminobenzene-2:5-disulfonic acid, or an aminonaphthalene mono-, dior tri-sulfonic acid, for example, 1-aminonaphthalene-o-suifonic acid, or 4- or 5 -aminosalicylic acid. Triazine radicals, which contain no free halogen atoms, are also reactive provided that, instead of such atoms,

3 1 other loosely bound substituents, forexample, phenoxy groups or groups of theformula bound through the sulfur atom, are present.

The metalliferous starting dyestuffs to beacylated can be made by methods in themselves known by hydrolysing the corresponding metal complexes containing acylamino groups and obtained by oxidative coppering, andof which the acyl group'is that a carboxylic acid of low molecular weight, and, if desired, by de-coppering and remetallizing to form a different heavy metal compound.

Thus, a monohydroxy-monoazodyestufis of the formula a LJ Z V p Y in which X, Y, Z and n have the meanings given above in connection with Formula 1, may be treated with an agent yielding copper, for example, copper acetate or copper sulfate, in the presence, of an oxidizing agent, for example, hydrogen peroxide, and an amino group in the complex so obtained is liberatedby hydrolysis and/or reduction.

Such met-allizablemonoazo-dyestuffs can be made, for

example, by coupling .1-amino-8-hydroxynaphthalene-4- or -6-sulfon-ic acid, l-amino 8-hydroxynaphthalene3:6-' or- -4:6-disulfonic acid, or.1-acylamino-8-hydroxynaphthalene-3z6- or -4:6-disulfonic acid, for example, l-benzoylamino-, l-(2' or 4-chlorobenzoylamino)-, 1-acrylamino-,

1-acetylamino-, l-propionylaminoa, l-fi-chloropropionylaminoor 1-n-butyrylamino-8-hydroxynaphthalene-3:6- or -4:6-disulfonic acid with a diazotized Z-aminonaphthalene sulfonic acid which contains no substituent in the 1- position.

As 2-aminonaphthalene sulfonic acids containing ,no substituent in the l-position there may be mentioned, for example,

When there is used for making a complex metal compound serving asstarting material a dyestutfof the lformula 4 which contains an acylatable. aminogroup, it is necessary, prior to the acylation in the process of the in-' vention or during the metallization, to liberate an amino group, for example by hydrolysing the substituent X or Z, or by reduction, when Z is a nitro group.

Alternatively, the dyestuifs of the invention can be made by oxidative metallization, if a starting dyestufi' of the Formula 4 is used in which at least one of the symbols X and Z represents a reactive acylarnino group of the kind referred to: above. I from the aforesaid Z-aminonaphthale'ne sulfonic acids containing no substitue'nt in the 1-position by diazotizingand coupling them with 1 hydroxy-naphthalene-sulfonic acids which contain in the 8-position the reactive acylaminO.

group of which the acyl radical is, for example, a halogen-1 1:3:5-triazine radical, halogen or propionyl radical or an acryloyl radical.

Such dyestufis can be obtained 5 The metal compounds to beacylated in accordance withrthe invention can also be made by metallizing, for example, coppering, chroming or cobaltizing, an ortho: ortho-dihydroxymonoazo-dyestuff, obtainable from one of the aforesaid l-amino-8-hydroxynaphthalene sulfonic acids by coupling it with a diazotized l-hydroxy-Z-aminonaphthalene sulfonic acid, and especially with ,diazotized 1-hydroxy-2-amino-naphthalene-4z8-disulfonic acid or 1- hydroxy-2-aminonaphthaleneA- or 5-sulfonic acid or lhydroxy-2-aminonaphthalene-4z 6: 8-trisulfonic acid.

The acylation of the complex metal compounds of monoazo-dyestuffs of the Formula 1, in which at leastv one of the symbols X and Z represents an acylatable amino group, with one of the aforesaid acid halides or anhydrides, especially with a dihalogen-triazi'ne compound, is advantageously carried out in the presence of an acidbinding agent,-such as sodium acetate, sodium hydroxide or sodium carbonate, and-under conditions such that the finishedproduct contains at least one exchangeable halo-, gen atom oran mus -unsaturated bond, that is to say, for example, by working inthe' presence of an organic solvent or atv a relatively. low temperature inan aqueous medium.

The resulting condensation products of metalliferous monoazo-dyestutfs which contain a monohalogen-triazine Y radical can also be made by reacting with. ammonia or anorganic hydroxyl compound or an organic amine a further halogen atom present'in a primary condensation product which has been obtained by condensing a metal-' liferous dyestuif of the kind described above with a cyanuric halide and which contains two exchangeable halogen atoms.

Alternatively, the acylation in the process'of the invention can be carried out, as stated above, before the dye-f stuffs are metallized, if dyestufis are used which can be so easily metalliz'ed that the :halogen atom of the metalfree dyestuif condensation product is not attackedduring the metalli'z'ation.

The new dyestuffs of this invention are valuable for jdyeing or printing a very .wide variety of fibrous 'materia1s,'such as cellulose, regeneratedcellulose such as viscose, linen or especially cotton. They are suitable for dyeing by the soacalled direct dyeing methods and especially .by printing methods or the pad dyeing method, in

which the dyestutf is applied to the material to be dyed and is fixed on the fiber in the presence of an alkali, if desired, with the action of heat, for example, by steaming.

The dyeings produced with the new dyestufl s on cel'-. lulose fibers are generally distinguished by their good fastness tolight and above all by their excellent fastness to washing.

The followingexamplesillustrate the invention, the

parts and-percentages being, byweight, and the relationship of parts by weight to parts by volume being the same as that of the kilogram to the liter:

EXAMPLE 1 off and dissolved in 1200 parts of water at 40 C. The

resulting solution is treated with 1 part of acetic acid, 30. parts of crystalline sodium acetate and 10031321115 .by vol ume of a molar aqueous copper. sulfate solution, and in.

t the course of l to 2 hours 180 to 230 partsby volume.

of a hydrogen peroxide solution of 6% strength are added dropwise, whereby the red reaction solution turns blue.

Thecopper complex soformed is filtered'ofi and heated,

for one hour at C. with sodiumhydroxide solution of 3% strength to eliminate the acetyl group. The man-- 'tion mixture is cooled, neutralized with hydrochloric acid and the dyestulf is filtered oil and dried.

A solution of 74 parts of the resulting cupriferous aminoazo dyestuff (sodium salt) in 1000 parts of water is added to a fine suspension of 19 parts of cyanuric chloride in 400 parts of ice water and 50 parts of acetone. The mixture is condensed at to C. while neutralizing the liberated mineral acid by the dropwise addition of a 2 N-sodium hydroxide solution (pH 5 to 7). On completion of the reaction 50 parts by volume of aqueous ammonia of strength are added and the mixture is stirred for 2 hours at 40 C. The dyestulf is then salted out, filtered olf and dried; it dissolves in water with blue coloration and dyes cellulose fibers reddish blue shades.

In an identical manner there are obtained by using the diazo and coupling components shown in columns I and II of thefollowing table and the amidating agents in column III, copper complex compounds which dye cotton the shades shown in column IV.

I II III IV 6-ohloro-2-aminonaph- 1-amino-8-hydroxy- Ammonia- Reddish thalene-4z8-disultonic naphthalenaBfiblue. acid. disullonic acid. 6-nitro-2-aminonaph 1-amino-8-hydroxy- S-amino- Greenthalene tz8-disulfonic naphthalene4- ben ish acid. sulfonic acid. zeneblue.

sulfonic acid.

1-amino-8-hydroxy- Ammonia Do.

2aminonaphthalenenaphthmene-3z6- 6:8-disuliom'c acid.

A solution of34.8 parts of 6-nitro-2-aminonaphthalene- 4:8-disulfonic acid in 100 parts of water is neutralized with sodium carbonate. The solution is mixed with 7 parts of sodium nitrite and run into a mixture of 30 parts of hydrochloric acid of 30% strength and 200 parts of ice water. The resulting diazo compound is run into a solution, containing sodium carbonate, of 52.4 parts of the secondary condensate from 1-amino 8-hy droxynaphthalene-3:6-disulfonic acid, aniline and cyanuric chloride. On completion of the coupling the dyestuff is salted out, filtered off and dissolved in 2000 parts of water. The resulting solution is treated with 1 part of acetic acid, 30 parts of crystalline sodium acetate and 100 parts by volume of a molar aqueous copper sulfate solution. About 400 parts by volume of a hydrogen peroxide solution of 6% strength are then added dropwise at 40 to 50 C. in the course of 2 hours, Whereupon a strong shift from violet red to blue occurs. The reaction is complete when on subsequent addition of hydrogenperoxide the color remains unchanged. The dyestuif so formed-a copper complex in which 'a mobile chlorine atom is attached to the triazineis salted out with sodium chloride, filtered off and dried. It dyes cellulose fibers, greenish blue, slightly covered tints. The dyeing is fast to light and outstandingly fast to washing.

When 6 nitro 2 aminonaphthalene 4:8 disulfonic acid is replaced by one of the diazo components in column I of the following table and the aforementioned sec ondary condensate by a coupling component shown in column II, there are obtained copper complexes which dye cotton the shades shown in column III.

I II III 2-aminonaphtha- 1-(4-phenylamino-6-chloro-1z 3: 5-- Reddish lene-G-sullonic triazinylamino)-8-hydroxynaptha blue. acid. lene-3:6:3"-trisul tonic acid. Z-aminonaphth a- 1- (4-phenylamino-6-chloro-1:3:5- Do.

lene-S-sulfonic triazinylamiuo)-8-hydroxynapthaacid. lene-3:6:3"-trisu1fonic acid. 2-aminou aphth a- 1- (4-phenylamiuo-6-chloro-1 :3 :5- Blue.

lens-4:6:8-trisultriazinylamino)-8-hydroxynaptha fonlc acid. lene-3-6-disul ionic acid.

EXAMPLE 3 The diazo compound obtained from 34.8 parts of 6- nitro-2-aminonaphthalene 4:8 disulfonic acid as described in Example 2 is coupled with 36.1 parts of 1- acetylamino-8-hydroxynaphthalene-3 :6-disulfonic acid in the presence of sodium acetate. The resulting dyestuff is subjected to coppering' under oxidizing conditions as described in Example 1. The resulting copper complex is filtered off, stirred with 600 parts of water, rendered slightly alkaline with sodium carbonate, heated to 55 C. and treated with a solution of 50 parts of crystalline sodium sulfide in parts of water. The mixture is stirred at 55 to 60 C. until the'reduction and the accompanying 'plete, whereupon the copper complex is salted outwith sodium chloride, filtered off and dried, to yield the dyestuff intermediate of the formula.

76.75 parts of the resulting coppered dyestuff, in the form of the neutral sodium salt, are dissolved in 700 parts of water and treated at 0 to 5 C. with a solution of 18.5 parts of cyanuric chloride in 60 parts of acetone. The mineral acid liberated during the condensation isneutralized (pH 6 to 7.5) by dropping in a 2 N-sodium carbonate solution. On completion of the reaction 25 parts by volume of aqueous ammonia of 20% strength are added and the mixture is stirred for 2 hours at 40 C. The dystufl? so formed is salted out, filtered off and dried;

it forms a dark blue powder which dissolves in Water with.

reddish blue coloration and dyes cellulose fibers reddish blue shades of outstanding fastness to wetness and light.

When the reaction With cyanuric chloride is followed by treating the resulting solution with sodium chloride, filtering olf the precipitated dyestufl and drying it at room temperaturc, the corresponding dichlorotriazine dyestuii is obtained which dyes cotton reddish blue shades.

When l-acetylamino-S-hydroxynaphthalene-3 :6-disulfonic acid used as coupling component is replaced by one 'of the following 3:6-disulfonic acidsl-propionylamino,

1-butyrylamino-, 1-[3-chloropropionylamino-,

1-acrylamino-,

l-benzoylamino-,

1-(4'-chlorobenzoylamino)- or 1-( 2'-chlorobenzoylamino) -8-hydroxynaphthalene tone.

there are obtained dyestulfs which dye cotton reddish blue to blue tints which have very good fastness to washing.

' When in the present example the 'l acetylamino-ii-hydroxynaphthalene-3:6-disulfonic acid is replaced by lpropionylarnino-4:6-disulfonic acid, 1-acetylamino-4 6-disulfonic acid or 1-benzoylamin o-8-hydroxynaphthalene- 4:6disulfonic acid, or by 1-acetylamino-8-hydroxynaph thalene-4-sulfonic acid, there are obtained dyestuffs which dye cotton slightly more reddish tints.

EXAMPLE 4 76.75 partsof the dyestuif intermediate of the formula nos s o en-YA 1111100011 HEN rross. SOaI-I son-1 7 prepared as described in Example 3 are heated in 500 parts of sodium hydroxide solution of 4% strength for 2 hours at 90 C. The dyestutf solution is cooled to room tem/-= weakly acidic (pH 5.0 to 5.5) with perature and rendered 2 N-acetic acidsolution. To re-copper the dyestuff intermediate which may have lost some of its copper'during the hydrolysis, 30 parts of a molar aqueous copper sulfate solution-are added. The mixture is stirred for one hour at 40 C., the dyestufi solution is saturated with sodium ch1oride and potassium chloride, and the Whole is stirred until the dyestuff has precipitated which is then filtered off and dried; 36.3 parts acylatable amino groups, are

of the resulting dyestutf, which containstwo parts of cyanuric chloride in 60 parts by volume of ace- The mineral acid liberated. during the condensation is continually neutralized (pH 6.0 to 7.5) by adding 2 N-sodiumhydroxide solution. On completion of thereaction 50 parts by volume of aqueous ammonia of 10% strength are added and the mixture is stirred, for 3 hours at about35 C. The dyestufi is then salted out, filtered off and dried. It forms .a bluish black powder which dissolves in water with blue-coloration and dyes cellulose fibers blue shades of excellent fastness to wetting.

EXAMPLE 5 7 3.7 parts of the tetrasodiurn salt of the aminoazodyestud of the formula (prepared by coupling diazotized 2-amino-1-hydroxy-. naphthalene-4:S-disulfonic acid with '1-amino-8-hydroxynaphtha1ene-3 6-disulfonic acid in the presence of c'alcium' hydroxide) are dissolved in 1000 parts of water and treated with 25 parts ofcryst-alline sodium acetate. A solution of 26 parts ofcrystalline copper sulfate is then run in and the mixture is stirred for 30 minutes at 30 C.

dissolved in 800-parts of water and mixed at to C. with a solution of 18.5

The filter cake is intimately mixed with a concentrated: solution of 5 parts of monosodium phosphate and 5 parts.

of disodium phosphate and dried in vacuo at 40 to C.

The dyestutt dissolves in water with blue coloration and dyes cotton reddish blue tints;

When the crude solution of the dichlorotriazine dyest'utf prepared as described above is mixedwith 40 parts of aqueousammonia of 10% strengthand the reaction mixture is stirred for 3 hours at 40 C., the aminochlorotriazine dyestuit is formed; which is salted'out with sodium chloride, filtered ed and. dried; Itdyes cellulose fibersreddish blue tints. 7

EXAMPLE 6 A mixture of 73.7 parts of the tetrasodium salt ofthe metal-free aminoazo dyestuff of the formula shown in The resulting solution of the copper complex is then I run into a suspension of 19 parts ofcyanuric chloridein 300 parts of ice water and 60 parts ofacetone and the re-" 1 action mixture is neutralized (pH 5.5 to 6) with a dilute sodium hydroxide solution. When a free amino group can no longer be detected, the resulting dichlorotriazine dyestuff is salted, out with sodium chloride and filtered 0E.

Example '5, 120 parts of a solution of sodium chromesalicylate containing 2.6% of chromium, and 800 parts of water is boiled for 6 to 10 hours.

Theresulting solution of the 1:2-chromium complex is allowed to cool, neutralized with dilute hydrochloric acid.

and mixedwith a solution of 19 parts of cyanuric chloride in 60 parts of acetone. The mixture is stirred for 2 hours at 5 C. and neutralized by the dropwise addition of about 100 parts by volume of N-sodium hydroxide solution.

5 parts of monosodium phosphate and 5 parts of disodium phosphate are added and the solution is evap-' orated to dryness'in vacuo at 40 C. The resulting new:- dyestufi forms a dark powder and ,dyes cellulose fibers.

slightly covered greenish blue tints.

When the solution of the 1:2-chromium compound ob- I tained asdescribed above is mixed with 9.3 parts of aniline andthe mixture is stirred for 4 hours at 30 C. while gradually adding about 8 parts of sodium bicarbonate, a

solution of the monochlorotriazine dyestufi is obtained 1 which is evaporated to dryness in vacuo. The dyestuff. dyes cellulose fibers slightly covered greenish blue tints.

EXAMPLE 8 A A solution of 73.7 parts of the tetrasodium salt of the metal-free aminoazo dyestufi of the formula shown in Example 5 in 800 partsofwater is mixed with 1100 parts by volume of 2 N-sodium hydroxide solution and 100 parts of a cobalt sulfate solution containing 3.25% of cobalt and the whole isheated for one hour at 80 C.

The resulting neutralized solution of the lz-2-cobalt complex compound is condensed with cyanuric chloride as described in the second paragraph of Example 7. The resulting solution of the dichlorotriazine derivative is then treated with 50 parts of aqueous ammonia of 10% strength" and stirred for 2 hours at 40 C. The resulting dyestuffan aminochlorotriazine derivative-is obtained as a powerby evaporating itssolution in vacuo. It dyes cotton covered violettish blue tints.

p In a similar manner the azo dyestutfs obtainedirom the diazo and coupling components shown in columns, I

and -II of the, following table can be converted into thev complex compounds of the metals. in column 111 which canbe reacted with eyanuric chloride and the amidating agent in column IV, or with a condensate'obtained from these two compounds (see Example 6). The dyestuffs so obtained dye cotton the shades shown in column V;

I II III IV V 2 amino 1 hydroxy naph- 1 amino 8 hydroxy naph- Cu 4 aminobenzenesul- Reddish thalene4:8 disulionic acid. thalene-3z6-disulionic acid. tonic aci blue.

Do do Cum- Aniline Do. Anthrauilic acid Do. fl-hydroxy-ethyla- D0.

nnne. -flydroxy-pro'pyla- Do.

mine. Ethylamine D0. -Methoxy-propyla- Do. mine.

Aniline-2:5disulionic Do.

acid. l-aminonaphthalene- D0.

fi-sulionic acid. Isopropylamine Do. 4- or fi-aminosalicylic D0.

acid. N-methylaniliue Do. Para-toluldine Do. Ammonia Bluish violet. do Ni- Morpholine D0.

1 amino 8 hydroxy naph- Cu Ammonia Covered thalene 4 sulionic acid. violet blue. do Cu Ethanolamine. Do. do Cr Ammonia Covered greenish blue. 1 amino 8 hydroxy naph- 011...- do Reddish thalenc 6 sulfonic acid. blue. do Cu. 3-aminobcnzoioacid Do. Do do Cu Morpholine ,Do.

2 amino- 1 --hydroxy -naph- 1 amino 8 hydroxy naph- Ou Ammonia Reddish thalene-4-sullonic acid. thalene-azfi'disulfonic acid. blue.

2-amino-l-hydroxy-naph- .do Cu do D0. thalene-fi sulfonio acid.

2 amino- 1 hydroxy-naphdo Cr do Covered thalenei-sulfonio acid. g eenish 1 blue. Do do Co do Covered reddish blue.

Z-amino-l-hydroxy-naphdo Gu do Blue.

thalene 4:6:8 trisulfonic acid.

Do do (30--.. Aniline Git-1571511 2 amino- 1 -hydroxy-naph- 1 ethylamino 8 hydroxy- Cu do Violettish thalene 4:8 disulfonic naphthalene 3:6 disulfonic I lue. acid. acid.

Do 1 amino 8 hydroxy naph- Cu Acetylphcnylene dia- Reddish thalene 3:6 disulfonic acid. mine. blue.v

EXAMPLE 9 The solution of the copper complex prepared as described in the first paragraph of Example is mixed with a solution of 18 parts of 6-methoxy-2:4-dichlorotriazine of sodium hydroxide in 200 parts of water and the reaction mixture is stirred until it has become neutral, while allowing the temperature to rise to 20 C. The whole is then treated with an aqueous solution of 76 parts of the of the sodium salt of para-phenolsulfonic acid and 8 parts.

in 200 parts of acetone and the mixture is stirred at to C. while maintaining it Weakly acid to neutral by gradually adding a dilute sodium hydroxide solution. The monochlorotriazine dyestufi so formed dyes cotton reddish blue tints.

Dyestuffs having similar properties are obtained when 6-methoxy-2:4-dichlorotriazine is replaced by'an equivalent amount of 6-ethoxy:2:4-dichlorotriazine, or 6-propoxy-Z:4-dichlorotriazine or 6- phenoxy-2:4-dichlorotriazine. When the latter is replaced by 6-phenthio-2z4-dichlorotriazine, a similar result is obtained.

EXAMPLE 16 A fine aqueous suspension of 19 parts of cyanuric chloride is mixed at O to 5 C. with a solution of 39.2 parts copper complex of the formula shown in Example 3 and the mixture is stirred for about 2 hours at 60 to C. at a pH value of 6 to 7, and the solution is then evaporated to dryness. The new dyestufi dyes cellulose fibers reddish blue shades which are fast to washing.

EXAMPLE 12 A solution of 30 parts of fi chloropropionyl chloride in 50 parts of acetone is slowly run into a solution of 72 parts of the copper complex (containing two amino groups) prepared as described in the first paragraph of Example 4, .While continually neutralizing the liberated mineral acid by adding dilute sodium hydroxide solution.

The dyestuff so formed is then salted out, filtered off and dried. It dyes cotton reddish blue tints.

When B-chloropropionyl chloride is replaced by an equivalent amount of azfi-dibromopropionyl chloride,

acrylic acid chloride or anhydride, chloromaleic acid anhydride, or ot-chloroacrylic chloride; dyestuffs are obtained which have similar properties.

EXAMPLE 13 The solution of the copper complex prepared as de- A scribedin the first paragraph of Example 5 is treateddropwise with a solution of 15 parts of acrylic acid chloride'in 50 parts of acetone and at the same time with an aqueous sodium acetate solution in a manner such that of the'dyestuff prepared as described thereaction mixture always remains neutral to Congo 2 red. When an amino group can no longer be detected, the resulting dyestufi is salted out and filtered off. It dyes cellulose fibers reddish blue tints which are .fast to light and washing.

Dyestufis having similar properties are obtained when, acrylic acid chloride is replaced by an equivalent amount of oc-chloracrylic acid chloride or p-bromopropionyl chloride.

EXAMPLE 14.

A solution of; 19 parts of cyanuric chloride in 60 parts of acetone is, vigorously stirred into an aqueous solution cooled with ice of 73.7 parts of the tetras'odium salt of the aminoazo dyestuff of the formula shQWn'in Example 5, andthe mixture is then stirred for 1 to 2 hours at 5 C. while maintaining its reaction weakly acid to litmus (pH 5 to 5.5) by adding dropwise a dilute sodium'hydroxide solution. 50 parts of ammonia of strength are then added and the mixture is stirred for 2 hours at to C. Coppering is performed by adding an aqueousarnmoniacal solution of copper sulfate (prepared from-26 parts of copper sulfate and 'parts of concentrated ammania) and the mixture is heated for about 30 minutes at 30 C., whereupon the dyestufi is salted out and filtered I oil. Its properties are substantially identical with those in the last paragraph of Example 5.

Instead of performing the amidation andthe coppering in two stages as described above, they may be performed in a single stage by adding a'strongly ammoniacal copper sulfate solution to the resulting dichlorotriazine compound and stirring the. mixture further for 2 to 3 hours at'the indicated temperature.

Dyeing method A A cotton fabricis impregnated with a solution of 2 parts.

of the dyestufiprepared asdescribed in Example 1 in 100 parts of water, squeezed until its weight shows an increase of 75% and then dried.

The fabric is. then impregnated witha solution at 20 C. containing per liter 10 grams of sodium hydroxide and 300 grams of sodium chloride, squeezed to a Weight increase ,of 75%, the dyeing is steamed for seconds at 100 to 101 C., rinsed, soaped for 15 minutes in a boiling 0.3% solution of a non-ionic detergent, rinsed and dried.

A reddish blue dyeing is obtained which is fast to washing and, light.

Dyeing method B A cotton fabric is impregnated with a solution of 3 parts of the dyestuff prepared as described in the first paragraph of Example 2, 2 parts of sodium carbonate and 25 parts of urea in 75 parts of water, then squeezed to a weight increase of '75 dried at 80" C., exposed to dry heat it 140 C..for6 minutes, rinsed and soaped at the boil. A greenish blue dyeing is obtained.

What is claimed is:

, 1. Acomplex copper compound containing one atomof'copper in complex union with substantially one molecule of a monoazmdyestuflf of the formula in which 'n is a positive whole number of at most 2, one.

Y is sulfonic acid and the other Y hydrogen, Z is a member selected from the group consisting of hydrogen, chlorine, nitro, sulfonic acid, 'acetylamino and halogenotriazinyl-amino, halogenotriazinylmeaning a radical of the formula wherein B is arn'ember selected from the group consisting of chlorine and bromine and B is a member selected from the group consisting of chlorine, bromine, an amino group, an etherified' hydroxy group and an etherified mercapto group, X is a member selected from the group consisting of an 'alkyl carboxylic acid amide radical containing at most 4 carbon atoms, an aromatic carboxylic acid amide radical of the benzenes series, the chloromaleic acid amide radical, the acrylic acid amide radical,

the chloroacrylic acidramide radical, the chloroacetic acid amide radical, the fi-chloropropionic acid amide radical, the ,B-bromopropionic acid amide radical, the azfi-dichloropropionic acid amide radical and a halogenotriazinyl-amino radical, halogenotriazinylmeaning, a radical as defined above, and which dyestuff contains at least two sulfonic" acid groups in the radical of the -diazo 'componentand at least/one. radical, selected from the group consisting ofthe-chloromaleic acid amide radical,

the acrylic acid amide radical, the chloroacrylic acid amide radical, the chloroacetic acid amide radical, the

[E-chlorOpropiofiic acid. amide .radical, the B-bromopropionic acid amide radical, the mfl-dichloropropionic acid amide radical, and a halogenotriazinylamino radical, halo.- genotriazinylmeaning a radical as defined above.

of copcr in complex union with substantially one mole- 2. A complex"coppercompoundv containing one atom of copper in complex union with substantially one mole-- cule of a monoazo-dyestutf of the formula in which n is a positive whole number of at most 3, one Y is hydrogen and the other Y sulfonic acid and B is an amino group.

3. A complex copper compound containing one atom of copper in complex union with? substantially one molecule of a monoazo-dyestulf of the formula in whichAc is the radical of an aliphatic carboxylic acid containing at most 4 carbon atoms and B is an amino group.

4. A complex copper compound containing one atom of copper in complex union with substantially one mole cule of a monoazo-dyestuff of the formula 13 in which B is an amino group.

5. A complex copper compound containing one atom of copper in complex union with substantially one molecule of a monoazo-dyestufi of the formula in which B is an amino group.

6. The complex copper compoundcontaining one atom of copper bound in complex union with substantially one molecule of a monoazo-dyestuff of the formula 7. The complex copper compound containing one atom 45 of copper bound in complex union with substantially one molecule of a monoazo-dyestuff of the formula 8. The complex copper compound containing one atom 14 of copper bound in complex union with substantially one molecule of a monoazo-dyestuif of the formula Hots OH HO NH-C N N=C N=N 10 HOaS- SOaH Y 9. The complex copper compound containing one atom of copper bound in complex union with substantially 15 one molecule of a monoazo-dyestuff. of the formula 10. The complex copper compound containing one atom of copper bound in complex union with substantially one molecule of a monoazo-dyestutf of the formula C 1 2 NH-C N HOaS OH H0 11. The complex copper compound containing one atom of copper bound in complex union with substantially one molecule of a monoazo-dyestuff of the formula 

1. A COMPLEX COPPER COMPOUND CONTAINING NE ATOM OF COPPER IN COMPLEX UNION WITH SUBSTANTIALLY ONE MOLECULE OF A MONOAZO-DYESTUFF OF THE FORMULA 